21303693

素因数分解:

$3^2\times {\mathrm{19}}^2\times {\mathrm{79}}^1\times {\mathrm{83}}^1$

素因数の和:206

約数の個数: 36

約数和(自身を含む): 33284160

約数和(自身を除く): 11980467

約数列:

[1, 3, 9, 19, 57, 79, 83, 171, 237, 249, 361, 711, 747, 1083, 1501, 1577, 3249, 4503, 4731, 6557, 13509, 14193, 19671, 28519, 29963, 59013, 85557, 89889, 124583, 256671, 269667, 373749, 1121247, 2367077, 7101231, 21303693]

約数ペア:

[(1, 21303693), (3, 7101231), (9, 2367077), (19, 1121247), (57, 373749), (79, 269667), (83, 256671), (171, 124583), (237, 89889), (249, 85557), (361, 59013), (711, 29963), (747, 28519), (1083, 19671), (1501, 14193), (1577, 13509), (3249, 6557), (4503, 4731)]